Spool attachment.



No. 870,478. PATENTED NOV. 5, 1907 W. I. STAAF. SPOOL ATTACHMENT.

APPLICATION FILED JULY 26. 1906.

NIH 4265525:

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WERNER I. STAAF, OF PITTSBURG, PENNSYLVANIA.

SPOOL ATTACHMENT.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed July 26. 1906. Serial No. 327.876-

To all whom it may concern:

Be it known that I, WERNER I. STAAF, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in SpoolAttachments, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to certain new and useful improvements in threadholders, and the invention has for its primary object the provision ofnovel means for retaining the end of a thread in engagement with a spoolupon which it is wound and also providing means for readily severing thethread when required.

Another object of this invention is to provide a simple and inexpensiveattachment for a spool of thread which will prevent the thread frombecoming entangled or unwound from the spool.

To this end, I have devised a spool attachment consisting of a piece ofwire bent to engage in the central opening of a spool, and upon thethread wound upon the spool, said wire normally holding the end of thethread in its wound course, but permitting of any quantity of threadbeing removed.

The detailed construction of my improved thread holder will be presentlydescribed, illustrated and then specifically pointed out in the appendedclaims.

Referring to the drawing forming part of this specification, likenumerals of reference designate correspond ing parts throughout theseveral views, in which Figure 1 is an elevation of a spool equippedwith my improved attachment, Fig. 2 is a similar view illustrating themanner of severing the thread, Fig. 3 is an end view of the spool, andFig. 4 is a perspective view of my improved spool attachment. Fig. 5 isa perspective view similar to Fig. 4, illustrating a modification in theconstruction.

In the drawing I have illustrated an ordinary spool 1 having acylindrical body upon which thread 2 is evenly wound. The spool hasperipheral end flanges 3 and a central longitudinally disposed opening4, generally used for revolubly mounting the spool upon a sewingmachine.

My invention resides in a wire attachment 5 comprising a thread holdingor hearing portion 6 having angularly disposed ends 7 adapted to embracethe flanges 3, the ends of the spool, and engage in the opening 4 ofsaid spool. The ends 7 of the attachment frictionally engage the ends ofthe spool, whereby the attachment can be revolved about the spool whennecessary. The portion 6 also frictionally engages the thread 2,especially the free end thereof, and prevents the thread from becomingunraveled.

Then it is desired to obtain a piece of thread from the spool, thedesired amount is unwound and is then pulled endwise from the spool, asclearly shown in Fig. 2, causing the thread to break, without ,becomingfurther unwound.

The wire at its threaded bearing points is flattened, as shown at 8 inFig. 5, and the flattened portions sharpened to form knife edges overwhich the thread can be severed when required. The said flattenedportions of wire will preferably be at the juncture of the straight bar6 and the angular ends 7, as shown in Fig. 5.

Should the free end of the thread be of considerable length, it can beeasily and quickly replaced upon the spool by simply turning theattachment upon the spool.

It is obvious that the attachment can be made of various sizes to fitupon different spools, and I wish it to be understood that such changesin the details of construction as are permissible by the appended claimsmay be resorted to Without departing from the spirit and scope of theinvention.

What I claim and desire to secure by Letters Patent, is:- I

A thread holder for spools formed from a single piece of wire comprisinga straight central bar adapted to bear against the thread on the spooland extended at the ends at angles to the central bar and thence bent atright angles to the bar and bearing against the ends of the spool withthe terminals extending inwardly to bear in the aperture' of the spoolat opposite ends, said bar being flattened at the juncture of the barand the angular portions and sharpened to form cutting means for thethread.

In testimony whereof I affix my signature in the presence oftwowitnesses.

WERNER I. STAAF. Witnesses H. C. EVERT, MAX H. SROLOVITZ.

